ABB Relion 670 Series Applications Manual page 583

1MRK 511 401-UEN Rev. K
Section 23
23.1 Authority status ATHSTAT
23.1.1 Application
Authority status (ATHSTAT) function is an indication function block, which informs about two
events related to the IED and the user authorization:
• the fact that at least one user has tried to log on wrongly into the IED and it was blocked
(the output USRBLKED)
• the fact that at least one user is logged on (the output LOGGEDON)
The two outputs of ATHSTAT function can be used in the configuration for different indication
and alarming reasons, or can be sent to the station control for the same purpose.
23.2 Self supervision with internal event list INTERRSIG
23.2.1 Application
The protection and control IEDs have many functions included. The included self-supervision
with internal event list function block provides good supervision of the IED. The fault signals
make it easier to analyze and locate a fault.
Both hardware and software supervision is included and it is also possible to indicate possible
faults through a hardware contact on the power supply module and/or through the
communication.
Internal events are generated by the built-in supervisory functions. The supervisory functions
supervise the status of the various modules in the IED and, in case of failure, a corresponding
event is generated. Similarly, when the failure is corrected, a corresponding event is generated.
Apart from the built-in supervision of the various modules, events are also generated when the
status changes for the:
• built-in real time clock (in operation/out of order).
• external time synchronization (in operation/out of order).
Events are also generated:
• whenever any setting in the IED is changed.
The internal events are time tagged with a resolution of 1 ms and stored in a list. The list can
store up to 40 events. The list is based on the FIFO principle, that is, when it is full, the oldest
event is overwritten. The list contents cannot be modified, but the whole list can be cleared
using the Reset menu in the LHMI.
The list of internal events provides valuable information, which can be used during
commissioning and fault tracing.
The information can, in addition to be viewed on the built in HMI, also be retrieved with the aid
of a PC with PCM600 installed and by using the Event Monitoring Tool. The PC can either be
connected to the front port, or to the port at the back of the IED.
Bay control REC670
Application manual
Security
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Section 23
Security
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